Traction-wheel.



UNITED sTATEs PATENT OEEIOE, ALFRED E. GLAsooc-K, or WASHINGTON, DIsTEIcT or COLUMBIA, Assieme, BY MEsNE AssIGNMENTsTo FAEMVMOTORy COMPANY, A'coRPoRATioN or SOUTH DAKOTA.

- TRACTIONWHEEL.

To alll whomz't. may concern:

`Be it known that I, ALFRED E. GL'AsCoCK, a citizen of the United State`s,'residing vat Washington, in the Districty of Columbia', have inventedA certain new and useful Imiprovements in Traction-Wheels, ofwlilich the beyond the rim of the wheel should the said occur only in soft eart Wheel shp or spin in soft earth, mud or sand.

Normally th 'said tractors lie within ythe rim" vof the wheel while the vehicle is in motion,y

`and beingso positioned when the wheel 4is passingy over hard roads, pavements or ridges, they can do no damage to the surface of suolil highways. Provision' is made or'returnind the said tractors to the interior ofthe wheel rim at each revolution thereof,

" thus thesaidtra'ctors cannot at any time remainin extended position with relation to `thewheel rim, and can assume such position only as a conse uence of slipping or spinning ofthe-Wheelfwh'ich `sli pingor spinning can ,mud or sandL,

' In the past numerous attem ts have been made to provide traction whee s with effective and 'unobjectionable movabletractors, bu't'for the greater part suchdevices have been unsatisfactory,` inasmuch as the all dependripensa lever or otherv manual y oper tion tothe Wheel'rirn. When such constructions fare lrelied upon theyvrequire the atten- Y tion ofan operator, or if neglected bythe opF eratonniay be the source ofdarnageboth to the engine and roadway to no'inconsiderable `de'gr ee. If through oversight or neglect such tractors are permitte relation to the Wheel While the erhA to remain extended gineis assing over a hardfroad ora smooth surface street', bridges','etc:,the said. tracfare, f and as' each tors will mutilate the surfaceof the thorough- .tractor'comes in .contact with the lvsmridsurface,the

sarily impedesy the speedv of the .engine and subjects the same to unnecessary jarring and and damage to themachinery incidentall thereto. Furthermore [in order to project the tractors'much energymust be'ex- -pended kfor unless the' traction wheelfis very soft "mud theengine must beat'leastf 'partial'ly lifted in order to have the'tractors extend to their greatest degree. A L In my present invention all'of thesev objections are eife'ctually" overcome, as .thel tractorsf'require no attention onthe part of `an" operator,- as 'they norniallylie .the wheel rimwvhile'the vehicle is moving and Aconsequently the' enginemay 4v.be run over yhardf'surfacesl with impunity-"and without vdamage toeither e' 11gine' ,or,roa d As they -are automatically eXtendedonly as aconse- 4quence of sli l which can on ping or. spinning of the wheel, y occurin soft ground'as above pointed out, they areprojected by the ener of the engine, which energy is usually Waste and'they therefore do not call for suchlabnrious manual exertion` in order to.be ex-` tended, as"movable tractors have heretofore required. l

lnthe accompanying drawings :-Figure 1 is a side elevation of an engine provided with the' traction wheel. of the wheel partly in section lshowin `the tractors extended ,at the lower portion t ereof.\l Fig. 3, is a side elevation of the Wheel partly in setion showing all of the tractors withdrawn. Fig. ,4.,- is a transverse sectional view of the wheelcut on the line 4-4of Fig. 3 and Fig. 5', is a detail perspective view of The traction wheel comprises the rim' 1,

- Fig. 2, is a side elevation a section of the wheel rim showing one ofthe 4 A l tractors pivoted in the perforation thereof. ated means for moving the tractors with relawhich is provided at suitable intervals with the perforations 2. VThe 'said perforations are-provided with the straight and radially disposed rear walls 3, and 4 leadinginto the outer. ends thereof. vThe opposite front wall is provided with the up` per or inner inelinedsurfaee 5, and the outer .arcuate surface 6. The' tractors 7 are lpanduriform in edge elevation, and are pivoted in the said perforations... vThe of"greate st breadth, and the-said tractors in length are greater than the breadth of the l pivot pins 8 pass through the said tractors at their points the inclined ducts.

wheelrim 7. As the pivot pins pass'through .the Atractors at 'intermediate points,fthf`a said tractors are so positioned that their inner ends are heavier than their outer ends.

l lower ends will be below the lower side of thev When the wheel is rotating, the centrifugal force tends to throw the heavier inner ends of the tractors outward, and this movement will cause `said inner ends to normallyv lie against the inclined sui'faces 5, and the lowerv or outer ointed ends of the tractors be Hush wit When the tractors are substantially radially dispgsed with relation Ito the wheel, their wheel and the front sides ofthe lower or outer portions 4of `the tractors will be against the arcuate surfaces 6.' By reason of the peculiar configuration and the positioning of the tractors in the said perforations, they will normally lie withtheir lowerends flush or within the wheel rim, and thus the wheel may pass over smooth surfaces without injuring the same. When, however, the wheel enters soft earth or'mud, the said earth or mud will pass up throu h the ducts 4 and against the rear sides of t e outer ends of the tractors. If at such time the Wheel should slip or spin greater quantities of the earth or mud are forced intothe ducts4 and as aconsequence-the tractors inenga ementwith the ground will be swung upon t eir pivots into 'substantially radial ositions andthe extended tractors will o er sufficient resistance to the earth 4to check the spinning of the -wheel and preserve the ener of the engine for propelling the same. T e pin 9 is fixed to a stationary oint at the-'side of the engine and has its end ying-in the lpath of the inner endsor the-saidgtractois''when4 the same are extended, and consequently Ias the said tractor ends. come in'contact with the said pin they are swun back into their normal ositions in the w eel rim,'a'nd the mud w 'ch has previously 1 entered the' perforations through the ducts 4 is forced through the said perforations and falls to the ground.

Having described my invention, what I claim as new and desire tosecure4 by Letters Patent is 1. A traction wheel aA tractor (pivotally inountedin said wheel and adapte to pro- 'ect b eyondgithe rimthereof, said tractor vheld normally retracted by the centi-ifm ga orce develo ed in the rotation of the' wheel, and a fixe means for positively withdrawing thetractor when projected, atfeach revolut1on of the wheel.

2. A 4traction wheel, a' tractor mounted thereon and adapted to be normally retract' ed Within the rim of the Wheel by the centrifugalv force developed in the rotation thereof,`

and means whereby earth vwill be forced between the tractor and said rim by the spinning of said wheel.

3.. A traction wheel, a tractor mounted in the rim' thereofandv free to swing under the influence of the centrifugal force developed the outer ends of the ductsv 4. i

Jin. the' rotation of said wheel, andfmeans whereby'earth will be forced betweenxsaidA tractor and said rim by the spinning of said 4. A traction wheel having a rim provided with perforations each having an inclined duct and a panduriform tractor' movably mounted in each erforation.

with 'perforations each havingan inclined duct and a panduriforrn tractor pivotally mounted in each erforation.

-6. Atractionw eel having la rim provided with perforationseach having an inclined duct, and a tractor pivoted in each perfqra tion and free to swing under the centrifugal force developed in the rotation of said wheel.

7. A traction wheel' rovided withaI perforated Arim 'having a uct leading into the perforation, and a tractor pivoted in said erforation and free to swing under vthe inlt'luence' of the centrifugal force Vdeveloped in the rotation of said wheel.

8. A. traction wheel. rovided with a perforated rirnjhaving auct leadi into the perforation at'the rear edge of the` atter, and

- 5; A traction W eel having a rim provided a tractor pivote'd in said perforation and free i to swing under-"the influence of the centrifugal force developed in the rotationof said wheel.

. 9. A traaimwheei haw-Ling a rim provided with perforatons each-having an inclined duct, and a tractor pivoted at a point between .its ends 'within each perforation.

,10. A,traction'iwheelhaving a rim provided With-,.perforations each having yan inclined' duct, and a'panduriforin tractor pivoted at a L pointbetwee'n its ends within each perforapro- -portion thereof when rim, an extensible tractor located in' the'perforation` and bearing against the lower por- ,tion of the forward edge of theperfox'ationI when extended and the upper portionthereof when-withdrawn.

vided with a perforation havin an inclined duct, a tractor pivotedin sai' j perforation .and bearing a ainst onel ortion of-.the for-4 ward ed e oft e perforat on when extended and anot er portion thereof when Withdrawn i 15. A traction vwheel having' aperforated rim,^aftra ctor pi'votedinI the perforation and v bearingagainst the lower portion of thefor'- `Ward.e.dge of the perforation when extended vand the 4upper portion thereof when'with'-1 drawn.

16. A traction Wheel having ,a perforatedrim with a duct leading into the erforation, and a tractor ivote'd in said pe oration and normallybearlng against the side thereof o 'posite said duct,under the iniiuence of t e centrifugal force developed in the rotation of said wheel.

17. A tractionwheel having in its rim a perforation provided at one edge -With' a 4curved surface and an inclined surface, a

tractor pivoted in said perforation and adapted to engage each of'said'surfaces when in extended and Withdrawn positions'.

1 8.` A traction wheel having in its. rim a perforation provided at one -edge with a curved surface and an inclined surface, and

v withdrawn positions.

, 19. A traction wheel having in its rim aljat its opposite edge a duct, va tractor pivoted -in said ,perforation and adapted to engage each of said surfaces when in extended and perforation provided at one edge with a curved .surface and an inclined surface, a

panduriforrn` tractor pivoted in said .perforations. Y

20. A traction Wheel having in its rim a tion andadapted to engage each offsaid sur- .faces when in extended and Withdrawn posiperforation provided at one edge with a op' osite the said duct.

n testimony whereof I affix-my signature',

in presence of two Witnesses.

ALFRED E. GLASCOCK. Witnesses:

WM. L. STUARD, B. D. SULLrvAN. 

